Ground Fault Circuit Interupter (GFCI/GFI)-- This device is very mysterious to many people. A few misconceptions regarding GFI's is: (1) resetting it without knowing cause (2)GFI's trip because there's too much "load" on the circuit.
It should be understood that a GFI is designed to monitor the current flow in the circuit going to and from the device (GFCI). The GFI trips when .004 amps of current leaves the circuit during usage. It's very sensative to this situation in order to prevent electrocution from water, moisture or electricity taking an unsafe path.
Resetting the GFI should be done only when the cause is known, and when it trips infrequently. I like knowing that a GFI is working properly when it trips, but only when I "test" it with my equipment.
Situations causing the GFCI to trip involve: (1) a faulty GFCI, (2) device not wired properly, (3) cord plugged into outlet is bad, (chafed, wet, or pinched). So, resetting the GFCI only means that the "leaking" current doesn't exist at this time. But it doesn't mean that everything is ok! If you have to reset the GFI a few times over time, call an electrician to investigate. I have pictures of outlets and switches that are charred and burned beyond repair because the device was reset without understanding the cause.
Having too much load on the circuit is monitored by the breaker at the main panel. The breaker trips when a line or load current takes an unintended path within the circuit (i.e. wires crossing, touching each other). Also, breakers trip when the load(s) on the circuit need more current than what's provided, or become heated from continuous use.
Smoke Detectors: I am including a website full of concise information regarding smoke detectors -- CLICK HERE.
I get called frequently to houses for chirping smoke detectors. Basically, the reasons vary depending on a few senerios. The smoke detector's need one or more of the following (1) battery need changed, (2) unit needs cleaned (3) proper wiring (4) replacement.
Scheduled maintenance is important on a regular basis in order to keep smoke detectors in working form. I recommend replacing detector units after 8-10 years, changing batteries and vacuuming dust from unit annually.
